Chip Resistors-Surface Mount

Part Number	Description / PDF	Quantity
CR1206-4W-473JT Venkel LTD	RES 47K OHM 5% 1/4W 1206	0
CR1206-8W-121JT Venkel LTD	RES 120 OHM 5% 1/8W 1206	0
TFCR0805-8W-C-4323FT Venkel LTD	RES 432K OHM 1% 1/8W 0805	20000
TFCR0805-10W-E-1202BT Venkel LTD	RES 12K OHM 0.1% 1/10W 0805	5000
CR1206-8W-9090FT Venkel LTD	RES 909 OHM 1% 1/8W 1206	0
TFCR1206-4W-K-4530FT-1K Venkel LTD	RES 453 OHM 1% 1/4W 1206	1000
CRS1206-4W-2322FT Venkel LTD	RES 23.2K OHM 1% 1/4W 1206	30000
TFCR0603-10W-E-1301BT Venkel LTD	RES 1.3K OHM 0.1% 1/10W 0603	205000
CR2512-1W-2101BT Venkel LTD	RES 2.1K OHM 0.1% 1W 2512	4000
TFCR0805-10W-E-2742BT-1K Venkel LTD	RES 27.4K OHM 0.1% 1/10W 0805	0
CR1206-4W-3R9JT Venkel LTD	RES 3.9 OHM 5% 1/4W 1206	607772
LCR1206-R390JT Venkel LTD	RES 390M OHM 5% 1/2W 1206	10000
CR1206-4W-563JT Venkel LTD	RES 56K OHM 5% 1/4W 1206	5000
TFCR0402-16W-E-5492DT-1K Venkel LTD	RES 54.9K OHM 0.5% 1/16W 0402	0
UPTF0805-10W-N-4872BT Venkel LTD	RES 48.7K OHM 0.1% 1/10W 0805	0
TFCR0402-16W-E-1301BT-1K Venkel LTD	RES 1.3K OHM 0.1% 1/16W 0402	0
CR1206-4W-1821FT Venkel LTD	RES 1.82K OHM 1% 1/4W 1206	0
TFCR0402-16W-E-1692BT-1K Venkel LTD	RES 16.9K OHM 0.1% 1/16W 0402	0
MELFC0204-ZC-3323FT Venkel LTD	RES 332K OHM 1% 2/5W MELF	6000
CRG0603-Q-1005FT Venkel LTD	RES 10M OHM 1% 1/10W 0603	10000

Chip Resistors-Surface Mount

1. Overview

Surface Mount Chip Resistors (SMD Resistors) are passive electronic components designed to limit current flow and divide voltages in printed circuit boards (PCBs). As key elements in Surface Mount Technology (SMT), they enable high-density PCB layouts and automated manufacturing. Their miniaturized footprint and reliability make them essential for modern electronics, including smartphones, automotive systems, and industrial equipment.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Thick Film Resistors	Cost-effective, standard tolerance ( 1%-5%), power ratings up to 1W	Consumer electronics, power supplies
Thin Film Resistors	High precision ( 0.01%), low noise, stable temperature coefficients	Medical devices, precision instrumentation
Power Resistors	High power dissipation (up to 3W), robust thermal management	Motor drives, EV battery management systems
Network Resistors	Multiple resistors in single package, matched temperature coefficients	Digital circuits, memory modules
Wirewound Resistors	High inductance, precise low-resistance values	Audio amplifiers, industrial control systems

3. Structure and Composition

Typical SMD resistors consist of: - Ceramic substrate (Alumina, 96% Al₂O₃) - Resistive layer (Ruthenium oxide for thick film, Nichrome for thin film) - Termination electrodes (Ni/Sn or Ag/Pd metallization) - Protective coating (Epoxy or glass encapsulation) Standard packages follow EIA dimensions (e.g., 0402, 0603, 0805).

4. Key Technical Specifications

Parameter	Description	Importance
Resistance Range	1 to 10M (film), 0.1 to 100k (power)	Determines current control capability
Tolerance	0.01% (precision) to 5% (general)	Impacts circuit accuracy
Power Rating	0.05W to 3W @ 70 C	Defines thermal dissipation limits
TCR	5ppm/ C (thin film) to 200ppm/ C	Affects stability over temperature
Operating Temp	-55 C to +155 C	Defines environmental reliability
Voltage Coefficient	<0.1ppm/V	Ensures voltage stability

5. Application Fields

Consumer Electronics: Smartphones, wearables, IoT devices
Automotive: ADAS sensors, battery management systems, ECUs
Industrial: PLCs, motor drives, power converters
Telecom: 5G base stations, optical transceivers
Medical: Diagnostic equipment, implantable devices

6. Leading Manufacturers and Products

Manufacturer	Representative Series	Key Features
Yageo	CRCW Series	0.05W-1W, 0.1% tolerance
Vishay	CRCWE Series	Thin film, TCR 25ppm/ C
ROHM	MCR Series	Power resistors up to 2W
Ohmite	PWR Series	High-power 3W devices
Bourns	CRCU Series	Network resistors with 8-element arrays

7. Selection Recommendations

Consider: - Required resistance tolerance and power rating - Operating temperature range (automotive needs -40 C to +125 C) - Package size constraints (e.g., 0402 for mobile devices) - Long-term stability requirements (medical applications prefer thin film) - Cost vs. performance trade-offs (consumer vs. industrial use) Example: For smartphone power management, select 0603 thick film resistors with 1% tolerance and 125 C rating.

8. Industry Trends

Key trends include: - Miniaturization: Development of 0201 and 01005 packages - Higher precision: Sub-0.01% tolerance thin film resistors - Enhanced thermal management: New materials for power densities >1W/mm - Automotive growth: AEC-Q200 qualified parts for EVs - Smart manufacturing: AI-driven resistor selection tools - Sustainability: Lead-free and halogen-free material adoption